ethdb, core: implement delete for db batch (#17101)

ethdb/interface.go

@@ -25,12 +25,17 @@ type Putter interface {
 	Put(key []byte, value []byte) error
 }
 
+// Deleter wraps the database delete operation supported by both batches and regular databases.
+type Deleter interface {
+	Delete(key []byte) error
+}
+
 // Database wraps all database operations. All methods are safe for concurrent use.
 type Database interface {
 	Putter
+	Deleter
 	Get(key []byte) ([]byte, error)
 	Has(key []byte) (bool, error)
-	Delete(key []byte) error
 	Close()
 	NewBatch() Batch
 }
@@ -39,6 +44,7 @@ type Database interface {
 // when Write is called. Batch cannot be used concurrently.
 type Batch interface {
 	Putter
+	Deleter
 	ValueSize() int // amount of data in the batch
 	Write() error
 	// Reset resets the batch for reuse